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| All Patents in class 409/235 | |||||
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| Number | Date | Patentee | Title | Type | |
| 5,538,373 | Jul. 23, 1996 | E.E. Kirkham | Machine Tool Vibration Isolation System | metalworking machine mechanisms | |
| 5,556,242 | Sep. 17, 1996 | E.E. Kirkham, P.C. Sheldon | Space Frame for a Machine Tool | workpiece changers and storage mechanisms | |
| 5,634,250 | Jun. 03, 1997 | V. Mihailovic | Hobbing Accessory for Vertical Milling Machine | milling machine accessories | |